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2008 F150 Fuse Box Diagram: Exploring the Fuse Boxes

2008 F150 Fuse Box Diagram: Find the correct fuse for the circuit you’re working on

This article shows you the 2008 F150 Fuse Box Diagram for the Passenger Compartment Fuse Box, also called the Power Distribution Box or the Central Junction Box. In your 2008 Ford F150, the electrical system is designed with a primary fuse box and an auxiliary relay box. The Passenger Compartment Fuse Box, Power Distribution Box, or Central Junction Box, is located under the dashboard on the passenger side. To access this fuse box, you’ll need to crawl under the dash and locate the trim panel and fuse box cover concealed in the footwell area.

To learn more about automotive fuses, see this article

To learn how to check a fuse visually or without removing it, see this article

Find the most commonly replaced fuses and bulbs here

The fuse box diagram and table below show all 71 fuses and all the relays. But most DIYers are looking for fuses and relays for the lights, power ports, and the blower motor.  I’ve listed the most commonly checked/replaced fuses here to save time. I’ve also listed the most commonly replaced bulbs. A blown fuse or bulb are the two most common reasons for lighting issues

Backup Light: Fuse #14 10A, Bulb #3156
Blower Motor: Fuse #116 30A and #13 10A
Headlight Low Beam Passenger Side: Fuse #23 10A, Bulb #H13 (dual filament for high and low beams)
Headlight Low Beam Driver’s Side: Fuse #25 10A, Bulb #H13 (dual filament for high and low beams)
Headlights High Beam: Fuse #35 20A, Bulb #H13 (dual filament for high and low beams)
Horn: Fuse #26 20A
Parking lamps: Fuse #6 15A Mini Fuse, Front park turn bulb #3157A (amber)
Power Ports: Rear: Fuse #37 20A, Instrument Panel: Fuse #117 20A, Cigar Lighter #110 20A, Overhead #18 10A
Stop and Turn lights: Fuse #2 20A Mini Fuse, Bulb #4057 or #3057

2008 F150 Fuse Box Diagram for Cabin Fuse Box in the passenger compartment

The cabin panel is located under the dash on the right-hand side of the instrument panel. Remove the trim panel and fuse box cover to access the fuses. To remove the fuse box cover, place a finger behind the PULL tab and your thumb above the PULL tab. Then pull the cover off.

2008 Ford F150 fuse diagram

How to find your fuse and the devices served by that fuse

There are 62 fuse slots in the cabin power distribution box. The chart shows only 10 to speed up load time. Here’s how to find the fuse and circuit you want.
1) Change the number of entries showing (in the Show Entries Box) to 100 and scroll the list.
2) Enter the name of the component you’re searching for in the Search box.
3) Use the Next/Previous buttons at the bottom of the table
This image shows how to navigate the table below

Fuse numberAmperageCircuits protected
F110Windshield wiper motor, Instrument Cluster (IC), Audio Control Module (ACM), Ignition switch
F220Stop/Turn lamps, ABS, T/T electric brake module, PCM (BOO signal), turn signal mirrors, CHMSL
F37,5Power mirrors, Memory seats and pedals
F410DVD battery power, Power fold mirror
F57.5Powertrain Control Module (PCM), Autolamp/sunload sensor, HVAC module, EATC, HVAC module, EATC, Evaporative emission canister vent solenoid
F615Parklamps, Body Security Module (BSM), Instrument panel
F75Audio Control Module (ACM)
F810Heated mirrors, Switch indicator
F920Fuel pump relay, Fuel injectors, Injector sense
F1020Trailer tow back-up lamps relay, Trailer tow parklamp relay
F1110A/C clutch relay, Integrated wheel ends solenoid
F125PCM power relay
F1310HVAC module, EMTC, HVAC module, EATC, Indicator flasher relay, Heated rear window relay, Blower motor relay, Trailer tow relay, battery charge
F1410Back-up lamp and Daytime Running Lamps (DRL) relay coil, A/C pressure switch, Redundant speed control switch, Heated PCV (5.4L), ABS
F155Floor shifter, Overdrive cancel switch, Instrument Cluster (IC), Traction control switch
F1610Brake-shift interlock solenoid
F1715Fog lamp relay
F1810Parking Aid Module (PAM), Electronic compass, Auto-dimming interior mirror unit, Heated seat module, driver side front, Heated seat module, passenger side front, Vehicle Security Module (VSM), Auxiliary power point
F1910Occupant Classification System Module (OCSM), Restraints Control Module (RCM)
F2010Auxiliary power point
F2115Instrument Cluster (IC)
F2210Audio Control Module (ACM), Roof opening panel switch, Door lock switch, passenger side, Door lock switch, driver sid
F2310Headlamp, right
F2415Battery saver relay
F2510Headlamp, left
F2620Horn relay
F275Passenger Air bag Deactivation (PAD) indicator, Instrument Cluster (IC)
F285Passive anti-theft transceiver module, Powertrain Control Module (PCM), Fuel pump diode
F2915PCM 4x4 power
F3015PCM 4x4 power
F3120Audio Control Module (ACM), Satellite Digital Radio Receiver System (SDARS) module
F3215Evaporative emission (EVAP) canister purge valve, A/C clutch relay, Charge Motion Control Valve (CMCV), Electronic fan clutch, Heated Oxygen Sensor (HO2S) #11. Heated Oxygen Sensor (HO2S) #21, Mass Air Flow/Intake Air Temperature (MAP/IAT) sensor, Heated positive crankcase ventilation (PCV) valve, EGR system module Variable Camshaft Timing (VCT) valve 1, Variable camshaft Timing (VCT) valve 2, Camshaft position sensor
F3315Shift solenoid, CMS #12 and #22, Ignition coils
F3415Powertrain Control Module (PCM)
F3520Instrument cluster high beam indicator, High beam headlamps, DRL disable relay
F3610Trailer tow connector, Park/stop/turn lamp, right rear, Multifunction switch
F3720Power point, console 1, Power point, console 2
F39Not used
F4020Daytime Running Lamps (DRL) enable relay, Vehicle Security Module (VSM), Main light switch, Multifunction switch
Not used
F4210Trailer tow connector, Park/stop/turn lamp, left rear, Multifunction switch
F10130Starter relay
F10220Ignition switch
F10320Anti-lock Brake System (ABS) module
F104Not used
F10530Trailer brake control module
F10630Trailer low relay, battery charge
F10730Power door locks (BSM)
F10830Seat control module, passenger side front
F10930Adjustable pedal switch, Seat control switch, driver side front, Driver Seat Module (DSM)
F11020Data Link Connector (DLC), Cigar lighter, front
F11130Clockwise (CW) motor 4x4 relay, Counterclockwise (CCW) motor 4x4 relay
F11240Anti-lock Brake System (ABS) module
F11330Windshield wiper motor
F11440Heated rear window relay, Heated mirror
F11520Roof opening panel module
F11630Blower motor relay
F11720Power point, Instrument panel
F11830Heated seat module, driver side front, Heated seat module, passenger side front
F40130 Circuit Breakerpower sliding window switch, rear, Roof opening panel module, Master window adjust switch, Window adjust switch, passenger side

2008 F150 Relay diagram underhood relay box

F150 underhood relay box

F150 underhood relay box

Tips to diagnose electrical issues on your 2008 F150

If your power windows don’t work
• The power windows don’t use fuses. They get power from a 30A circuit breaker #401 in the fuse box diagram above.

If your blower motor doesn’t work
The blower motor gets its power from the blower motor relay #R06 in the fuse box diagram above. Power comes into the motor on the brown/yellow wire. It seeks ground through the brown/white wire, which runs to the fan speed switch and then to ground #203, located in the passenger footwell.

If the circuit you’re working on contains a relay
• A simple way to test a relay is to swap in a similarly shaped relay and see if the component works.
• If that doesn’t work, remove the relay and test for power to the relay control coil and contacts using a multimeter. For more information on relay testing, see this article.

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